The plot by the Scarecrow in this episode to poison Gotham City's water supply by using Arkham's basement is similar to the main plot of the 2005 film Batman Begins, the only major difference being that the Scarecrow was working with Ra's al Ghul, the plot's true mastermind.

Batman seeing hallucinations of the Joker resembles a plot point that would have occured in the cancelled fifth Batman film Batman Triumphant.

Whilst the Joker's first laugh in this episode sounds like Mark Hamill's portrayal, the second and third sound are far too high-pitched. Loren Lester stepped in to fill the role for the episode.

This plot may have been based on the storyline The Last Arkham, in which Batman commits himself to Arkham Asylum to investigate a series of grisly murders, only to be imprisoned by asylum administrator Jeremiah Arkham, who believes Batman to be truly insane.

When Batman is shown being wheeled in on a stretcher, he raves, "Robin... look out... Joker's got a bomb!" This is a reference to Jason Todd, the second Robin in the comic book series, who was killed by a bomb set by the Joker.

A hallucination by Batman resembles The Mask.

In one scene Dr. Bartholomew refers to The Joker as Jack Napier, which hints at his portrayal in Tim Burton's 1989 Batman movie.

Dr. Bartholomew could be a reference to Dr. Bartholomew Wolper, the doctor that treated the Joker and Two-Face in Frank Miller's Batman: The Dark Knight Returns.

Scarecrow does indeed have a new mask in this episode (though it is not much different from the previous one). The new mask does have some differences from the previous mask; it has a slightly different stitch job, the hair is also combed and much neater than before, the eye slits are smaller and the eyes therefore take up more room and the teeth are slightly smaller. The mask is also tighter than before and has a smaller jaw and is much less awkwardly large then before.

Scarecrow's tone of voice is once again altered, it sounds more like a calmer version of his previous tone (giving him a more criminal like voice). After this episode the tone of voice falls back upon the college professor tone. Scarecrow wears the new mask for the remainder of the series until the revamp occurs.

I'm gonna make two more rounds from this episode (One specifically on the hallucination scene).

Excellent. I love the hallucination scene with the four villains (Joker, Penguin, Dent and Ivy).

This is a fantastic episode all around. I loved the premise of Batman locked away in Arkham. Great idea and so well executed. This was the best of the Scarecrow episodes from BTAS. One of the more darker episodes of the series, too.

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"Sometimes I remember it one way. Sometimes another. If I'm going to have a past, I prefer it to be multiple choice!"

I enjoyed both "Tyger, Tyger" and "Dreams In Darkness". I do remember back in '05' that BB had a similar villain plot. The animators for this ep. were able to create some haunting and striking images from Batman's hallucinations . And it was interesting seeing a paranoid Batman for most of the ep. I always found that sub main title of batman in a straitjacket a little disturbing. I always thought at the end when a bat opens or lifts it's wings over the light and it's shadow covers over Bruce as he sleeps was a very powerful and somewhat haunting way to end that ep. It seemed as if that bat was watching over Bruce as he gets a good night's rest.

Ted Dymer is visually based on and voiced by series producer Bruce Timm. The video store clerk resembles Paul Dini, Timm's writing partner, who was quite heavy at the time (it is said he was inspired to lose weight after seeing himself caricatured as such on Tiny Toon Adventures).

Ted Dymer himself appears to be the basis for The Batman villain Cosmo Krank, aka Toymaker.

Adam West, who voices the Gray Ghost, played Batman in the 1960s. Timm and Dini have stated that they wanted West from the beginning to voice Simon Trent, and they would not have done the episode had he refused, since they feared he would be offended by an animated parody of his typecasting. West, however, was happy to voice the character; it has brought him newfound respect among Batman fans.

Although Adam West had a reasonable career following his stint on Batman (he was paid in royalties and does voice-work in animation), Simon Trent's financial troubles mirror those of Al Hodge, the actor who played the lead role in Captain Video and His Video Rangers in the 1940s. Don Hastings, Bob Hastings' younger brother, played the Video Ranger, Captain Video's young sidekick.

The Gray Ghost's appearance is very similar to the Golden Age superhero The Sandman, The Spirit, and the pulp magazine hero The Shadow.

The Gray Ghost poster that shows a giant version of the hero standing above skyscrapers is homage to the Shadow pulp cover for the story "Shadowed Millions".

The poster in the shrine in the Batcave features the Gray Ghost holding his cape the same way as the Batman: The Animated Series logo.

The Gray Ghost episode "The Mad Bomber" was episode 18. This episode of Batman is also episode 18 (production-wise).

Another episode is labeled Dr. Death, which is also the name of one of Batman's first villains from the comics.

Another episode is called "Terror in the Sky", which is also the name of a Batman: The Animated Series episode.

A poster at the signing event mentions Matt Hagen, who would later become the villain Clayface. This is his first appearance.

West performed a similar self-parody on an episode of Disney's Kim Possible, voicing a retired actor famous for his role as crime fighter "The Fearless Ferret". Not knowing that the Ferret was just a television character, he passes on his costume to Kim's sidekick, Ron Stoppable (voiced by Will Friedle, who voices Terry McGinnis on Batman Beyond). Similarly, in that episode Ron's forays into crime fighting are monitored by West's character over the radio, in the same fashion that Bruce Wayne monitors Terry as the new Batman.